docs: def getBirthdate(self, string=True):
          """
          Returns the birthdate as string object
  
          Parameters
          ----------
          None
  
          Examples
          --------
          >>> import pyedflib
          >>> f = pyedflib.data.test_generator()
          >>> f.getBirthdate()=='30 jun 1969'
          True
          >>> f._close()
          >>> del f
  
          """
  
          if string:
              return self._convert_string(self.birthdate.rstrip())
          else:
              return datetime.strptime(self._convert_string(self.birthdate.rstrip()), "%d %b %Y")